Pneumatic-jet propulsor for Arctic lifeboat: efficiency justification

Abstract

Object and purpose of research. This paper reviews the findings of efficiency justification study for pneumatic-jet propulsion of Arctic lifeboat. These results lead to the conclusion that this non-conventional type of propulsion could be a promising solution for fast escape beyond the hazard zone in case of emergency. Materials and methods. The results presented in this paper are based on well-studied and proven methods of solid mechanics, variable-mass mechanics and heat transfer. The relevance of the task of personnel evacuation from marine facilities in ice conditions is confirmed by the summary analysis of publications and patents about this topic, as well as by the experience of KSRC researchers. Main results. The study yielded the data on the lifeboat’s kinematics, as well as the curves of kimematic parameters for various types of the propellant. It also analysed the stability of pneumatic-jet propulsor operation in design conditions under effect of thermal and inertial disturbances. The results obtained for the closed lifeboat’s emergency escape from the hazard zone have shown that this type of lifeboat propulsion surely has practical potential. Conclusion. Pneumatic-jet propulsion might considerably increase the evacuation process efficiency in terms of the fast escape from the hazard zone. Simple design and operation principle reduce the time needed to prepare for the emergency escape. Also, this type of propulsion features robustness against long-term thermal disturbances with respect to its design conditions. Pre-defined safety radius may be ensured through variation of the propellant’s thermodynamic properties.

Keywords

• pneumatic-jet propulsion
• evacuation stages
• arctic lifeboat
• propellant parameters